Genetic introgression between Semisulcospira species endemic to Lake Biwa, and its effects on the susceptibility to trematode parasites

2015 Fiscal Year Final Research Report

• Project/Area Number: 25440243
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: Urabe Misako 滋賀県立大学, 環境科学部, 教授 (50263421)
• Co-Investigator(Kenkyū-buntansha): AGATSUMA Takeshi 高知大学, 医学部・看護学科, 特任教授 (40117031)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 種分化 / 二次交雑 / 遺伝子浸透 / 固有種 / 共進化

Outline of Final Research Achievements

Genetic introgression between Semisulcospira snails in Lake Biwa was investigated using a new nuclear genetic marker (PkInt-2). Three species endemic to Lake Biwa and one non-endemic (S. libertina) formed different clades, but the other non-endemic (S. reiniana) showed a great intraspecific variation in its sequences. The Pk-Int2 showed greater heterozygosity than another common genetic marker (ITS-1) both in S. habei and S. decipiens. These results suggest that genetic introgression between Semisulcospira species is greater than expected, and more samples and loci are needed to identify genetic markers characteristic of each species.

Free Research Field

寄生虫学、生態学、陸水生物学